{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.813","julian_year":2026.813,"time":"2026-10-24T21:33:50.903Z","years_from_j2000":26.813,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued position is carried along the great circle the object's own published motion puts it on, at a constant velocity, from the epoch that position was measured at, and the result is referred to the true equator and equinox of this instant. Those are separate things: the motion moves the object, and the rotation turns the grid under it by about fifty arcseconds a year, with nutation adding up to another seventeen.","excluded":"Parallax, the radial-velocity perspective term, aberration and refraction; each is below the accuracy of the catalogued positions themselves. An object with no published proper motion comes back where the catalogue has it rather than at a fabricated zero, and says so with a null pm_ra_mas_yr. The motion runs from position_epoch_jyear where the upstream publishes one — a timed pulsar's position belongs to the year it was timed — and from J2000 where it does not. A body with no fixed position is not propagated at all — its place comes from an ephemeris, which is what /api/v1/visible answers with."},"slug":"hd-57264","name":"65 Aur","class":"g8iii_yellow_giant","category":"star","object_type":"G8III yellow giant","mag":5.12,"mag_band":"V","abs_mag":0.823,"abs_mag_band":"V","distance_ly":236.00316719568067,"distance_method":"parallax","ra_deg":110.51095500000001,"dec_deg":36.760584,"epoch_ra_deg":110.960948,"epoch_dec_deg":36.709325,"epoch_moved_arcsec":2.709,"pm_ra_mas_yr":-98.6,"pm_dec_mas_yr":-22.08,"position_epoch_jyear":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Auriga","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-57264","source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0","attribution":"HYG Database v4.1, Astronexus (github.com/astronexus/HYG-Database). Fields derived from it stay under CC BY-SA 4.0.","commercial_use":"allowed"},"radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"07220+3646","companions":[{"measured":2015,"magnitude":11.7,"components":"AB","discoverer_code":"BU  901","separation_arcsec":11.6,"position_angle_deg":10},{"measured":2013,"magnitude":12.56,"components":"AC","discoverer_code":"BU  901","separation_arcsec":46.2,"position_angle_deg":41}],"spectral_type":"G8III","uncertainties":{"metallicity_fe_h":[0.01,0.01]},"color_index_bv":1.082,"luminosity_solar":40.813139159697194,"metallicity_fe_h":-0.38,"radial_velocity_km_s":23,"spectral_type_source":"SIMBAD (2007MNRAS.374..664C, quality D)","surface_gravity_log_g":2.56,"surface_temperature_k":4598,"metallicity_fe_h_source":"Median of 2 spectroscopic determinations in 2 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":-98.6,"proper_motion_dec_mas_yr":-22.08,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"65 Aur"},{"catalog":"HD","designation":"HD 57264"},{"catalog":"HIP","designation":"HIP 35710"},{"catalog":"HR","designation":"HR 2793"}],"updated_at":"2026-10-01T09:42:28.932Z","citation":{"plain":"SpaceCatalog. 65 Aur [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hd-57264","bibtex":"@misc{spacecatalog_hd-57264,\n  author       = {{SpaceCatalog}},\n  title        = {{65 Aur}},\n  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},\n  year         = {2026},\n  url          = {https://spacecatalog.org/object/hd-57264},\n  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}\n}","url":"https://spacecatalog.org/object/hd-57264","release":"DR1","doi":null},"references":[{"bibcode":"2007MNRAS.374..664C","ads_url":"https://ui.adsabs.harvard.edu/abs/2007MNRAS.374..664C/abstract","quantity":"properties.spectral_type_source"}],"attribution":"Data from SpaceCatalog.org. Each record names its upstream in `source`, with that producer's terms in `source.license`, the acknowledgement it asks for in `source.attribution`, and whether its terms allow commercial use in `source.commercial_use`; those terms govern the record, and citing SpaceCatalog does not discharge them."}